In reference to a species, the ability to discriminate between differences in colored stimuli or between colored and white stimuli; this discrimination must not be due to intensity (brightness) of the stimuli. To perceive color, two or more types of visual receptor, each of which is maximally sensitive to a different wavelength, are necessary. There are three types of primatecone that overlap one another, but are maximally sensitive at wavelengths of 440, 535, or 566nm, respectively.